/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.state.api.utils;

import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.util.CloseableIterator;

import java.util.ArrayList;
import java.util.List;

/** A utility for collecting job results. */
public class JobResultRetriever {

    public static <T> List<T> collect(DataStream<T> input) throws Exception {
        List<T> results = new ArrayList<>();
        try (CloseableIterator<T> iterator = input.executeAndCollect()) {
            while (iterator.hasNext()) {
                results.add(iterator.next());
            }
        }

        return results;
    }
}
